Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 9 27.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 09/27/2021   11:36:46   (  70.23,   5.68) 09/27/2021   11:37:16  (  70.25,   5.62)    2.65                30
 09/27/2021   12:27:27   ( -70.14, 173.14) 09/27/2021   12:26:46  ( -70.13, 173.09)    2.30                41
 09/30/2021   03:53:05   (  70.30, 121.52) 09/30/2021   03:53:41  (  70.31, 121.59)    2.45                36
 09/30/2021   04:43:46   ( -70.21, -71.01) 09/30/2021   04:43:11  ( -70.19, -70.94)    2.99                35
 10/02/2021   20:09:23   (  70.32,-122.55) 10/02/2021   20:10:07  (  70.30,-122.54)    1.47                44
 10/02/2021   21:00:04   ( -70.22,  44.92) 10/02/2021   20:59:37  ( -70.19,  44.94)    3.03                27
 10/05/2021   12:25:41   (  70.33,  -6.63) 10/05/2021   12:26:32  (  70.35,  -6.60)    2.18                51
 10/05/2021   13:16:22   ( -70.23, 160.85) 10/05/2021   13:16:02  ( -70.24, 160.88)    1.72                20
 10/05/2021   14:06:49   (  69.28, -30.42) 10/05/2021   14:05:42  (  69.35, -32.69)   89.65                67
 10/08/2021   04:41:58   (  70.35, 109.29) 10/08/2021   04:42:57  (  70.33, 109.26)    2.39                59
 10/08/2021   05:32:39   ( -70.25, -83.23) 10/08/2021   05:32:27  ( -70.23, -83.26)    2.50                12
 10/08/2021   06:23:12   (  69.56,  85.12) 10/08/2021   06:22:03  (  69.61,  83.54)   61.67                69
 10/10/2021   20:58:16   (  70.37,-134.80) 10/10/2021   20:59:22  (  70.36,-134.81)    1.06                66
 10/10/2021   21:48:57   ( -70.26,  32.69) 10/10/2021   21:48:52  ( -70.26,  32.67)    0.77                 5
 10/10/2021   22:39:35   (  69.85,-159.36) 10/10/2021   22:38:23  (  69.92,-160.16)   31.89                72